CN115353761A - Polymer cement anticorrosive paint and preparation method thereof - Google Patents
Polymer cement anticorrosive paint and preparation method thereof Download PDFInfo
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
- C09D1/06—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances cement
- C09D1/08—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances cement with organic additives
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
- C08F2/26—Emulsion polymerisation with the aid of emulsifying agents anionic
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- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
- C08F2/30—Emulsion polymerisation with the aid of emulsifying agents non-ionic
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1804—C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention discloses a polymer cement anticorrosive paint and a preparation method thereof. The method comprises the synthesis of modified polypropylene emulsion and the preparation of anticorrosive paint. The raw materials for synthesizing the modified polyacrylic acid emulsion comprise the following components in parts by weight: 1-5 parts of anionic emulsifier, 1-3 parts of non-ionic emulsifier, 70-100 parts of deionized water, 0.2-0.8 part of pH buffer, 0.5-1.5 parts of initiator, 80-120 parts of acrylic monomer, 1-3 parts of self-crosslinking modified monomer, 0.4-1 part of 2-vinyl furan and 0.4-1 part of pH regulator; the raw materials for preparing the polymer cement anticorrosive paint comprise the following components in parts by weight: 50-70 parts of cement, 20-30 parts of modified polyacrylic acid emulsion, 4-10 parts of water, 0.1-0.3 part of water reducing agent and 1-3 parts of defoaming agent. The corrosion-resistant polymer cement anticorrosive paint prepared by the invention has the advantages of ultraviolet resistance, acid and alkali resistance, good impermeability, high bonding strength and good low-temperature flexibility, and overcomes the current situations of easy corrosion, easy cracking and easy shedding of the existing buildings.
Description
Technical Field
The invention belongs to the technical field of building coatings, and particularly relates to a polymerized cement anticorrosive coating and a preparation method thereof.
Background
The concrete is widely applied to the fields of road and bridge engineering, water conservancy and hydropower, petrochemical industry and the like. However, the concrete has a porous structure, and corrosion factors such as carbon dioxide, water, ions and the like can easily permeate into the concrete through the gaps in the concrete, so that the concrete is corroded. In addition, concrete is a brittle material, and micro cracks generated by stress can accelerate the damage of corrosion factors to the concrete. The reasonable concrete structure protection not only can greatly reduce the construction and maintenance cost of the concrete, but also can effectively prevent catastrophic accidents caused by the failure of the concrete. Currently, the use of anti-corrosive coatings is one of the most effective methods in concrete protection. The coating protection not only has the characteristics of low protection cost and simple construction process, but also can be directly coated on the surface of old concrete, thereby effectively avoiding the problem that the concrete needs to be dismantled and rebuilt in the maintenance process.
The surface film forming type coating is widely applied in the field of concrete corrosion prevention, and a compact corrosion-resistant layer is formed on the surface of concrete, so that corrosion factors are effectively prevented from permeating into the concrete. The inorganic coating has the advantages of better ultraviolet aging resistance, heat resistance, durability, low cost and the like, the organic coating is superior to the inorganic coating in the aspects of carbonization resistance, permeability resistance, chemical corrosion resistance and the like, and the flexibility, adhesive force, chemical corrosion resistance and permeability resistance of the cement-based material are effectively improved by adding the polymer.
The existing coating cannot take the anticorrosion characteristic into consideration on the basis of water resistance, and easily causes potential safety hazards and service time periods of a plurality of buildings, so that a waterproof and anticorrosion coating is urgently needed at present.
Disclosure of Invention
Aiming at the technical problems, the invention provides the polymer cement anticorrosive paint and the preparation method thereof, and the prepared corrosion-resistant polymer cement anticorrosive paint has the advantages of ultraviolet resistance, acid and alkali resistance, good impermeability, high bonding strength and good low-temperature flexibility.
The invention adds functional monomer glycidyl methacrylate, self-crosslinking modified monomer and 2-vinyl furan in the synthesis of acrylic emulsion to synthesize modified polyacrylic emulsion, and then mixes the modified polyacrylic emulsion with cement to form the polymer cement anticorrosive paint with good corrosion resistance, thereby overcoming the current situation that the existing building is easy to corrode, crack and fall off.
In a first aspect, the invention provides a preparation method of a polymer cement anticorrosive paint, which comprises the following steps in parts by weight:
(1) Preparing modified acrylic emulsion:
dissolving 1-5 parts of anionic emulsifier, 1-3 parts of nonionic emulsifier, 0.2-0.8 part of pH buffer, 1-3 parts of self-crosslinking modified monomer and 0.4-1 part of 2-vinyl furan in 70-100 parts of deionized water, and stirring and dispersing uniformly; then adding 80-120 parts of acrylic monomers, adding 0.5-1.5 parts of initiator after pre-emulsification, heating for reaction and keeping the temperature; then 0.4 to 1 portion of pH regulator is used for regulating the pH value to 8.0 to 9.0, thus obtaining the modified acrylic emulsion;
(2) And (2) stirring and uniformly mixing 20-30 parts of modified polyacrylic acid emulsion, 50-70 parts of cement, 5-10 parts of water, 0.1-0.3 part of water reducing agent and 1-3 parts of defoaming agent to obtain the polymer cement anticorrosive paint.
Further, the anionic emulsifier is sodium dodecyl sulfate or sodium dodecyl benzene sulfonate; the nonionic emulsifier is alkylphenol polyoxyethylene or polyvinyl alcohol.
Further, the pH buffering agent is sodium bicarbonate or sodium hydrogen acetate or disodium hydrogen phosphate.
Further, the initiator is a persulfate-bisulfite oxidation-reduction initiation system. Preferably, the initiator is potassium persulfate-sodium bisulfite.
Further, the acrylic monomer comprises 1-7 parts of methacrylic acid, 50-75 parts of butyl acrylate, 28-35 parts of methyl methacrylate and 1-3 parts of glycidyl methacrylate; the self-crosslinking modified monomer is acrylamide or N-hydroxymethyl acrylamide.
Further, the pH regulator is ammonia water or sodium hydroxide or potassium hydroxide.
Further, the cement is P.I42.5 ordinary portland cement.
Further, the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent or an amino carboxylic acid water reducing agent, and the water reducing rate is more than or equal to 25 percent; the defoaming agent is polyether defoaming agent and organic silicon defoaming agent.
Further, in the step (1), the temperature is raised to 70-80 ℃ and the reaction time is 4 hours; the heat preservation temperature is 80-90 ℃, and the heat preservation time is 45min.
Further, the modified acrylic emulsion prepared in the step (1) is filtered by using a 120-mesh filter cloth.
In a second aspect, the present invention provides a polymer cement anticorrosive coating prepared by the method of the first aspect.
According to the preparation method provided by the invention, the anionic emulsifier and the nonionic emulsifier are simultaneously selected, and the emulsion prepared by independently using the anionic emulsifier and the nonionic emulsifier has excellent performance, so that molecules of the two emulsifiers can be alternately adsorbed on the surface of the emulsion particle, the electrostatic repulsion between ions on the same colloidal particle is reduced, the adsorption fastness of the emulsifier on the colloidal particle is enhanced, the charge density on the surface of the emulsion particle is reduced, the negatively charged free radicals can easily enter the emulsion particle, and the emulsion polymerization speed is increased. The pH buffering agent keeps the pH value of the emulsion system unchanged in the reaction process and maintains the stability of the emulsion system; the pH regulator regulates the pH of the emulsion within a proper range, and improves the storage stability of the emulsion. The oxidation-reduction initiator system for the initiator can effectively reduce the residual quantity of volatile monomers in the acrylic emulsion, improve the initiation rate, reduce the polymerization reaction temperature and improve the conversion rate of the monomers; the addition of the water reducing agent ensures that the coating is not adhered and is easy to melt. The addition of the defoamer prevents the formation of bubbles in the coating, or reduces or eliminates the original bubbles.
In the acrylic monomers, methyl methacrylate is used as a hard monomer, so that the price is low, and the hardness and the water resistance of a coating film can be improved; the soft monomer butyl acrylate can improve the flexibility and the ductility of the coating; methacrylic acid is used as a functional acrylic monomer, so that the prepared emulsion has good stability, moderate hardness of a coating film and excellent performance. The glycidyl methacrylate is taken as a functional monomer, and in the emulsion polymerization process, the epoxy group contained in the glycidyl methacrylate can generate a crosslinking reaction with the carboxyl in the system, and the epoxy group can also generate a polycondensation crosslinking reaction to form a glycidyl methacrylate/N-hydroxymethyl acrylamide/methacrylic acid multiple crosslinking system.
A small amount of acrylamide or N-hydroxymethyl acrylamide chain links are added into the polymer emulsion, so that the movement of polymer molecules can be controlled, the polymerization stability and the storage stability of an emulsion polymerization system are optimized, and the water resistance of the acrylic emulsion is effectively improved. because-COOR, -OH and-COOH groups exist in the structure of the polymer emulsion, hydroxyl and amide groups in N-hydroxymethyl acrylamide and amide groups in acrylamide react with-OH or-COOH groups in the emulsion under certain conditions to generate hydrophobic chemical bonds, and the water resistance of the emulsion is improved. Meanwhile, the original linear structure can form a three-dimensional net-shaped interweaving structure in the film forming process through crosslinking modification; the molecular bond energy is increased, and the formed macromolecular structure is not easy to degrade, so that the ultraviolet resistance and high temperature resistance of the coating are enhanced, and the swelling degree of the coating caused by the water molecules entering the macromolecular chains is reduced.
The furan ring in 2-vinylfuran is a heterocyclic organic containing a five-membered aromatic ring consisting of four carbon atoms and one oxygen atom. 2-vinyl furan with proper amount is introduced into the polymer emulsion, and can generate polymerization reaction with itself under the conditions of initiator and heating, and also can generate polymerization reaction with-C = C-in methacrylic acid, butyl acrylate, methyl methacrylate, acrylamide and N-hydroxymethyl acrylamide to form a coating layer with a compact network structure. And the acrylic emulsion modified by 2-vinyl furan has no active functional group in the structure and does not participate in the reaction with corrosive media, so that the prepared coating has good corrosion resistance. In addition, due to the introduction of furan rings on the molecular structure of the polymer, the coating film has outstanding excellent performances of alkali resistance, acid resistance, solvent resistance, heat resistance and the like.
The invention has the beneficial effects that:
(1) Glycidyl methacrylate is added into the polymer emulsion, epoxy group ring-opening reaction of the glycidyl methacrylate can be carried out, polycondensation and dehydration are carried out under the acid catalysis, and the glycidyl methacrylate and carboxyl can also be carried out under the condition that carboxyl exists in a system, so that acrylic ester polymer macromolecules form a three-dimensional network structure, and the hardness, the adhesive force and the water resistance of a coating film can be improved.
(2) A small amount of acrylamide or N-hydroxymethyl acrylamide is added into the polymer emulsion to optimize the polymerization stability and storage stability of an emulsion polymerization system, and the synthesized modified acrylic emulsion is used for preparing the anticorrosive paint to improve the ultraviolet resistance, high temperature resistance and water resistance of the paint.
(3) A small amount of 2-vinyl furan is introduced into the polymer emulsion, polymerization reaction is carried out under the condition of an initiator, furan rings are introduced, so that the modified acrylic emulsion has no active functional groups, and the prepared polymer cement coating has good corrosion resistance.
(4) The acrylic emulsion has better light resistance, weather resistance, acid and alkali resistance and corrosion resistance from the monomer structure, and the modified acrylic emulsion is used for preparing the anticorrosive coating, so that the prepared anticorrosive coating has the advantages of ultraviolet resistance, acid and alkali resistance, good impermeability, high bonding strength and good low-temperature flexibility, and overcomes the current situations of easy corrosion, easy cracking and easy shedding of the existing buildings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the examples, the parts are parts by mass.
Example 1
The preparation method of the polymer cement anticorrosive paint provided by the embodiment comprises two parts of synthesis of the modified polypropylene emulsion and preparation of the anticorrosive paint. The raw materials for synthesizing the modified polyacrylic acid emulsion comprise the following components in parts by weight: 3 parts of sodium dodecyl sulfate, 2 parts of alkylphenol polyoxyethylene, 85 parts of deionized water, 0.5 part of sodium bicarbonate, 1 part of potassium persulfate-sodium bisulfite, 100 parts of acrylic monomers (4 parts of methacrylic acid, 63 parts of butyl acrylate, 31 parts of methyl methacrylate and 2 parts of glycidyl methacrylate), 2 parts of acrylamide, 0.7 part of 2-vinyl furan and 0.7 part of ammonia water; the raw materials for preparing the polymer cement anticorrosive paint comprise the following components in parts by weight: 60 parts of cement, 25 parts of modified polyacrylic acid emulsion, 7 parts of water, 0.2 part of polycarboxylic acid high-efficiency water reducing agent and 2 parts of polyether defoaming agent.
The preparation method comprises the following steps:
(1) Weighing deionized water, an anionic emulsifier, a nonionic emulsifier, a pH buffering agent, a self-crosslinking active monomer and 2-vinylfuran, adding into a three-neck flask, and stirring for 3-5 min at 500-600 r/min in a water bath kettle at 40-50 ℃ until the solution is uniformly dispersed; then weighing acrylic monomers, draining by using a glass rod, slowly pouring into a three-neck flask, and pre-emulsifying for 20-30 min; then weighing an initiator aqueous solution, dripping the initiator aqueous solution into a three-neck flask by using a dropping funnel for 20-30 min, simultaneously heating the temperature of a water bath kettle to 70-80 ℃, reacting for 4h, then heating to 80-90 ℃, and keeping the temperature for 45min; finally, ammonia water is used for adjusting the pH value to 8.0-9.0, the mixture is cooled to 40 ℃, and the obtained mixture is filtered by 120-mesh filter cloth, so that the modified acrylic emulsion can be obtained.
(2) Weighing liquid components prepared by uniformly mixing water, a defoaming agent, a water reducing agent and the modified acrylic emulsion in the step (1), and then weighing solid component cement;
(3) And (3) adding the solid components in the step (2) into a mechanical stirrer, adding the liquid materials while stirring, mechanically stirring for 5min after mixing, and standing for 1-3 min until bubbles disappear to prepare the polymer cement anticorrosive paint.
Example 2
The preparation method of the polymer cement anticorrosive paint provided by the embodiment comprises two parts of synthesis of the modified polypropylene emulsion and preparation of the anticorrosive paint. The raw materials for synthesizing the modified polyacrylic acid emulsion comprise the following components in parts by weight: 5 parts of sodium dodecyl sulfate, 3 parts of alkylphenol ethoxylates, 85 parts of deionized water, 0.5 part of sodium bicarbonate, 1 part of potassium persulfate-sodium bisulfite, 100 parts of acrylic monomers (4 parts of methacrylic acid, 63 parts of butyl acrylate, 31 parts of methyl methacrylate and 2 parts of glycidyl methacrylate), 2 parts of acrylamide, 0.7 part of 2-vinylfuran and 0.7 part of ammonia water; the raw materials for preparing the polymer cement anticorrosive paint comprise the following components in parts by weight: 60 parts of cement, 25 parts of modified polyacrylic acid emulsion, 7 parts of water, 0.2 part of polycarboxylic acid high-efficiency water reducing agent and 2 parts of polyether defoamer.
The preparation method is the same as example 1.
Example 3
The preparation method of the polymer cement anticorrosive paint provided by the embodiment comprises two parts, namely synthesis of the modified polypropylene emulsion and preparation of the anticorrosive paint. The raw materials for synthesizing the modified polyacrylic acid emulsion comprise the following components in parts by weight: 3 parts of sodium dodecyl sulfate, 2 parts of alkylphenol ethoxylates, 85 parts of deionized water, 0.5 part of sodium bicarbonate, 1 part of potassium persulfate-sodium bisulfite, 101 parts of acrylic monomers (4 parts of methacrylic acid, 63 parts of butyl acrylate, 31 parts of methyl methacrylate and 3 parts of glycidyl methacrylate), 2 parts of acrylamide, 0.7 part of 2-vinylfuran and 0.7 part of ammonia water; the raw materials for preparing the polymer cement anticorrosive paint comprise the following components in parts by weight: 60 parts of cement, 25 parts of modified polyacrylic acid emulsion, 7 parts of water, 0.2 part of polycarboxylic acid high-efficiency water reducing agent and 2 parts of polyether defoamer.
The preparation method is the same as example 1.
Example 4
The preparation method of the polymer cement anticorrosive paint provided by the embodiment comprises two parts of synthesis of the modified polypropylene emulsion and preparation of the anticorrosive paint. The raw materials for synthesizing the modified polyacrylic acid emulsion comprise the following components in parts by weight: 3 parts of sodium dodecyl sulfate, 2 parts of alkylphenol polyoxyethylene, 85 parts of deionized water, 0.5 part of sodium bicarbonate, 1 part of potassium persulfate-sodium bisulfite, 100 parts of acrylic monomers (4 parts of methacrylic acid, 63 parts of butyl acrylate, 31 parts of methyl methacrylate and 2 parts of glycidyl methacrylate), 3 parts of acrylamide, 0.7 part of 2-vinyl furan and 0.7 part of ammonia water; the raw materials for preparing the polymer cement anticorrosive paint comprise the following components in parts by weight: 60 parts of cement, 25 parts of modified polyacrylic acid emulsion, 7 parts of water, 0.2 part of polycarboxylic acid high-efficiency water reducing agent and 2 parts of polyether defoamer.
The preparation method is the same as example 1.
Example 5
The preparation method of the polymer cement anticorrosive paint provided by the embodiment comprises two parts, namely synthesis of the modified polypropylene emulsion and preparation of the anticorrosive paint. The raw materials for synthesizing the modified polyacrylic acid emulsion comprise the following components in parts by weight: 3 parts of sodium dodecyl sulfate, 2 parts of alkylphenol ethoxylates, 85 parts of deionized water, 0.5 part of sodium bicarbonate, 1 part of potassium persulfate-sodium bisulfite, 100 parts of acrylic monomers (4 parts of methacrylic acid, 63 parts of butyl acrylate, 31 parts of methyl methacrylate and 2 parts of glycidyl methacrylate), 2 parts of acrylamide, 1 part of 2-vinylfuran and 0.7 part of ammonia water; the raw materials for preparing the polymer cement anticorrosive paint comprise the following components in parts by weight: 60 parts of cement, 25 parts of modified polyacrylic acid emulsion, 7 parts of water, 0.2 part of polycarboxylic acid high-efficiency water reducing agent and 2 parts of polyether defoaming agent.
The preparation method is the same as example 1.
Comparative example 1
In the comparative example, on the basis of example 1, glycidyl methacrylate is not added, and the rest is not changed.
Comparative example 2
In the comparative example, acrylamide is not added on the basis of the example 1, and the rest is not changed.
Comparative column 3
In the comparative example, on the basis of example 1, 2-vinyl furan is not added, and the rest is not changed.
Comparative example 4
This comparative example was based on example 1, omitting step (1), and replacing the modified acrylic emulsion in step (2) with water.
The prepared coating is subjected to performance test:
the polymer cement anticorrosive coatings prepared in examples 1 to 7 and comparative examples 1 to 4 were subjected to performance tests, and the tensile strength, elongation at break, adhesive strength and low-temperature flexibility of the polymer cement coatings were tested according to the GB/T16777-2008 standard.
Placing the test piece in an ultraviolet box, wherein the space temperature of the test piece which is about 50mm away from the surface of the test piece is (45 s 2) DEG C, irradiating for 240h at constant temperature, taking out the test piece, placing for 4h under standard test conditions, cutting a dumbbell I-shaped test piece which meets the GB/T528 requirement, clamping the test piece on a tensile testing machine, and stretching the test piece to the tensile strength and the elongation at break of the test piece under the ultraviolet treatment condition; rectangular (120X 25) mm test pieces were placed in 600mL0.1% chemically pure sodium hydroxide (NaOH) solution and 2% chemically pure sulfuric acid (H) 2 SO 4 ) Soaking in the solution, taking out, wiping to dry, placing in an electric heating air blast oven at the temperature of (60 days 2) DEG C for 6 hours and 15 minutes, taking out, placing under standard test conditions for (18 days 2) hours, cutting a dumbbell I-shaped test piece meeting GB/T528 requirements, clamping the test piece on a tensile testing machine, and stretching to the tensile strength and the elongation at break of the test piece under acidic and alkaline conditions; fixing the test piece on a drawing testing machine by using an epoxy adhesive, keeping the center line of the surface of the test piece in the vertical direction and the center of a clamp of the testing machine on the same line, stretching until the test piece is damaged, and recording the maximum tensile force of the test piece, namely the bonding strength of the test piece; placing the test piece and the bent plate or the round bar in refrigerating fluid of a low-temperature refrigerator adjusted to the specified temperature, keeping the thermometer probe and the test piece at the same horizontal position for 1 hour at the specified temperature, bending the test piece 180 degrees in the refrigerating fluid around the round bar or the bent plate within 3 seconds, and observing whether the surface of the test piece has cracks or not by naked eyes. And testing the impermeability of the polymer cement coating according to the GB/T23445-2009 standard, putting the test piece into a permeameter, enabling the surface of the test piece to have a water permeability phenomenon, and recording the water pressure (MPa) at that time.
TABLE 1 Performance parameters of anticorrosive coatings prepared in examples 1 to 5 and comparative examples 1 to 4
Conclusion and analysis:
from the above test results, it can be seen that the performance of examples 1, 4, and 5 is better than that of comparative example. In example 2, the amount of the emulsifier is increased, and the water absorption of the coating film becomes large, resulting in a decrease in the performance of preparing the coating; in example 3, the increase in the amount of glycidyl methacrylate increased the gel fraction of the emulsion polymerization, deteriorated the polymerization stability, and increased the water absorption, resulting in a decrease in the performance of the coating material. In comparative examples 1, 2 and 3, glycidyl methacrylate, acrylamide and 2-vinyl furan which are not added respectively have influence on the performance of the synthesized emulsion, and further influence on the performance of the coating; in comparative example 3, the coating prepared by replacing the modified acrylic emulsion with water becomes an inorganic coating, resulting in a decrease in the performance of the coating.
In conclusion, the corrosion-resistant polymer cement anticorrosive paint prepared by the invention has the advantages of ultraviolet resistance, acid and alkali resistance, good impermeability, high bonding strength and good low-temperature flexibility, and overcomes the current situations of easy corrosion, easy cracking and easy falling of the existing buildings.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any modification, equivalent replacement, and improvement made by those skilled in the art within the technical scope of the present invention should be included in the scope of the present invention.
Claims (10)
1. The preparation method of the polymer cement anticorrosive paint is characterized by comprising the following steps of:
(1) Preparing a modified acrylic emulsion:
dissolving 1-5 parts of anionic emulsifier, 1-3 parts of nonionic emulsifier, 0.2-0.8 part of pH buffer, 1-3 parts of self-crosslinking modified monomer and 0.4-1 part of 2-vinyl furan in 70-100 parts of deionized water, and uniformly stirring and dispersing; then adding 80-120 parts of acrylic monomer, adding 0.5-1.5 parts of initiator after pre-emulsification, heating for reaction and keeping the temperature; then 0.4-1 part of pH regulator is used for regulating the pH value to 8.0-9.0, thus obtaining modified acrylic emulsion;
(2) And (2) stirring and uniformly mixing 20-30 parts of modified polyacrylic acid emulsion, 50-70 parts of cement, 5-10 parts of water, 0.1-0.3 part of water reducing agent and 1-3 parts of defoaming agent to obtain the polymer cement anticorrosive paint.
2. The production method according to claim 1, characterized in that: the anionic emulsifier is sodium dodecyl sulfate or sodium dodecyl benzene sulfonate; the nonionic emulsifier is alkylphenol polyoxyethylene or polyvinyl alcohol.
3. The method of claim 1, wherein: the pH buffer is sodium bicarbonate or sodium acetate or disodium hydrogen phosphate.
4. The production method according to claim 1, characterized in that: the initiator is a persulfate-bisulfite oxidation-reduction initiation system.
5. The method of claim 1, wherein: the acrylic monomer comprises 1-7 parts of methacrylic acid, 50-75 parts of butyl acrylate, 28-35 parts of methyl methacrylate and 1-3 parts of glycidyl methacrylate; the self-crosslinking modified monomer is acrylamide or N-hydroxymethyl acrylamide.
6. The method of claim 1, wherein: the pH regulator is ammonia water or sodium hydroxide or potassium hydroxide.
7. The method of claim 1, wherein: the cement is P.I42.5 ordinary portland cement.
8. The method of claim 1, wherein: the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent or an aminocarboxylic acid water reducing agent, and the water reducing rate is more than or equal to 25 percent; the defoaming agent is a polyether defoaming agent or an organic silicon defoaming agent.
9. The production method according to claim 1, characterized in that: in the step (1), the temperature rise reaction temperature is 70-80 ℃, and the heat preservation temperature is 80-90 ℃.
10. The polymer cement anticorrosive paint is characterized in that: obtainable by the process of any one of claims 1 to 9.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116333522A (en) * | 2023-04-12 | 2023-06-27 | 湖北工业大学 | Polymer cement waterproof paint with high adhesive property and preparation method thereof |
| CN116426184A (en) * | 2023-04-27 | 2023-07-14 | 湖北工业大学 | Polymer cement anti-corrosion paint based on two-dimensional inorganic material and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08151251A (en) * | 1994-11-25 | 1996-06-11 | Mitsui Toatsu Chem Inc | Polymer cement mortar composition |
| JP2007001804A (en) * | 2005-06-23 | 2007-01-11 | Emulsion Technology Co Ltd | Acrylic resin emulsion for polymer cement, acrylic resin emulsion composition for polymer cement, polymer cement composition, and method for forming waterproofing layer |
| CN101608087A (en) * | 2009-07-24 | 2009-12-23 | 佛山市顺德区巴德富实业有限公司 | Polymer cement waterproof coating acrylic emulsion |
| CN111234082A (en) * | 2020-03-12 | 2020-06-05 | 广东巴德富新材料有限公司 | Amphoteric emulsion for permeation-sealed primer and preparation method thereof |
-
2022
- 2022-08-09 CN CN202210948136.XA patent/CN115353761B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08151251A (en) * | 1994-11-25 | 1996-06-11 | Mitsui Toatsu Chem Inc | Polymer cement mortar composition |
| JP2007001804A (en) * | 2005-06-23 | 2007-01-11 | Emulsion Technology Co Ltd | Acrylic resin emulsion for polymer cement, acrylic resin emulsion composition for polymer cement, polymer cement composition, and method for forming waterproofing layer |
| CN101608087A (en) * | 2009-07-24 | 2009-12-23 | 佛山市顺德区巴德富实业有限公司 | Polymer cement waterproof coating acrylic emulsion |
| CN111234082A (en) * | 2020-03-12 | 2020-06-05 | 广东巴德富新材料有限公司 | Amphoteric emulsion for permeation-sealed primer and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116333522A (en) * | 2023-04-12 | 2023-06-27 | 湖北工业大学 | Polymer cement waterproof paint with high adhesive property and preparation method thereof |
| CN116333522B (en) * | 2023-04-12 | 2024-01-09 | 湖北工业大学 | Polymer cement waterproof paint with high adhesive property and preparation method thereof |
| CN116426184A (en) * | 2023-04-27 | 2023-07-14 | 湖北工业大学 | Polymer cement anti-corrosion paint based on two-dimensional inorganic material and preparation method thereof |
| CN116426184B (en) * | 2023-04-27 | 2024-05-17 | 湖北工业大学 | Polymer cement anti-corrosion paint based on two-dimensional inorganic material and preparation method thereof |
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